Skull-shaped light bulb



FIG. 1 is a perspective view of my design for a skull-shaped light bulb;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a right side view thereof.

The ornamental design for a skull-shaped light bulb, as shown.